Firearm



Patented June 20, 1939 FIREARM Czechoslovakia,

Application April 13, 1937, Serial No. 136,571 In Czechoslovakia April17, 1936 2 Claims.

My invention relates to automatic firearms with the barrel supported inthe frame for ready exchange.

It is an object of my invention to provide means for so supporting thebarrel in the frame at a point between the breech and muzzle, that thebarrel can be readily exchanged and replaced.

According to this invention the -means for suporting the barrel are soarranged on the barrel and the frame that when the barrel is mounted inplace on the frame, they interlock and lock the barrel on the frame,while, when the barrel shall be exchanged, they form an abutment for thetilting of the barrel about the point of support near the muzzle, at thesame time allowing the barrel to be moved in the longitudinal directionof its axis.

In rearms, in which the barrel is arranged for sliding motion relativeto the frame, the supporting and locking means also serve to guide thebarrel.

In the drawing aixed to this specification and forming part thereof arearm embodying my invention is illustrated diagrammatically by way ofexample.

In the drawing Fig. 1 is a side elevation, partly in axial section, ofthe frame and the barrel mounted therein.

Fig. 2 is a similar View illustrating the way in which the barrel isremoved from the frame.

Fig. 3 is a cross section, drawn to a larger scale of the frame andbarrel on the line III-III in Fig. 1.

Referring to the drawing, I is the barrel and II is the frame. 3, 3 areribs on the breech end of the barrel extending at right angles to thebarrel axis and 4, I are notches in the breech end of the movable breechcase 5 mounted in the frame I I, which notches extend in parallel to theribs 3 on the barrel. I3, I3 are a pair of ledges on the inner sides ofthe forward end on the frame I I, said ledges extending in parallel tothe barrel axis on either side of the barrel. lila, Ib are pairs of lugsmounted on the barrel and extending substantially at right angles to andabove and below the barrel axis, respectively, said lugs being spaced toembrace the ledges I3 on the frame, when the barrel is mounted in theframe. The lower lugs Illa are arranged forward of the upper lugs Ib.I6, I6 are a pair of vertical projections mounted in spaced relation onthe cross piece I'I connecting the two walls of the frame II and I5 is alug extending downwardly from the bottom of the barrel and fitting inbetween the pair of ledges I6.

The lugs lila and Ilb are arranged in staggered relation so that thefront ends of the lugs Illb are spaced the distance e from the rear endsof the lugs Illa.

When it is intended to replace the barrel, the 5 breech end which isinterlocked with the body of the arm or the movable breech by meanssimilar to those shown in French patent specication No. 733,153, isunlocked and the muzzle end is depressed and tilted about the forwardbottom 1 edges I8 of the lugs IIlb resting on the ledges I3, until theribs 3 are free of the notches 4, the breech end 0I the barrel moving inthe direction of arrow p, whereupon the barrel can be pulled l5 out inlongitudinal direction as indicated by the arrow q, being thusdisengaged from the ledges I3,

Obviously the means for supporting the barrel in the frame according tothis invention may be applied to iirearms of widely different types withstationary as well as with sliding barrel. In the latter case the meansfor supporting the barrel between the breech and muzzle ends may formguides for the movable barrel.

I wish it to be understood that I do not desire 25 to be limited to theexact details of construction shown and described for obviousmodifications will occur to a person skilled in the art.

I claim:

l. In a fire arm in combination, a gun body formed with an axiallyextending recess, a barrel seated in said recess, interlocking means onsaid body and the breech end of said barrel to hold said breech to saidbody with its breech end supported for ready removal of the breech endof said barrel in vertical direction, two inwardly directed horizontalledges facing each other on the inner walls near the muzzle end of saidrecess, and two pairs of outwardly directed horizontal ledges on saidbarrel, one pair extending above, the other below the ledges xed to theinner walls of said recess, when the barrel is seated in said recess,said pairs of ledges being arranged in staggered relation, the lowerpair extending forward of the vertical plane containing the front edgeof the upper pair.

2. In the re arm of claim 1, means for centering the barrel on thebottom of the body comprising a vertically extending ledge on one and apair of spaced vertically extending ledges on the other of the coactingparts, said three ledges being arranged to interlock when the barrel isseated in the gun body.

